| http://www.w3.org/ns/prov#value | - To prevent a cyan line from being detected erroneously as noise, the difference between a maximum value in lightness (255) and one of the values in lightness output from the line sensors other than line sensor 213R, i.e., line sensors 213G and 213B, reading a color complementary to red, or cyan, can be set as Ref1 (G), Ref1 (B).
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